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(Click for frequent words.) 63 dispersants 62 dispersant 61 chemical dispersants 58 dispersant Corexit 57 toxic dispersants 55 Dispersant 55 Corexit dispersant 55 subsea dispersants 55 chemical dispersant 54 COREXIT 52 oil sheens 52 Corexit #A 52 skimmers booms 51 Corexit dispersants 51 chemical Corexit 51 toxic dispersant 51 spraying dispersants 50 toxic chemical dispersant 50 Dispersants 50 microcystins 50 booms skimmers 49 corals reproduction 48 naphthenic acids 48 PAHs polycyclic aromatic hydrocarbons 48 blowdown stacks 48 fracturing fluids 48 oily sludge 48 BTEX 48 evening newcasts 48 chemical dispersant Corexit 48 hydrocarbon vapors 48 ecologically sensitive wetlands 47 toxic chemical dispersants 47 spraying chemical dispersants 47 frac fluid 47 Containment dome 47 dispersing chemicals 47 hydro fracturing 47 Airplanes sprayed 47 fracing fluids 47 metal degreasing 47 algal 47 filter feeders sucking 46 halibut bycatch 46 Corexit 46 drillship Discoverer Enterprise 46 PFCAs 46 triclocarban 46 sargassum 46 carcinogenic polycyclic aromatic hydrocarbons 46 dispersants underwater 46 solvent vapors 45 evaporated dispersed 45 Dawn dishwashing soap 45 eclipses Exxon Valdez 45 Lynda Giguere 45 Thick sticky 45 Administrator Jane Lubchenco 45 ethyl mesilate 45 subsurface plumes 45 produce sooty acrid 45 Controlled burns 45 Ira Leifer 45 blowdown drums 45 Deepwater Horizon gusher 45 brodifacoum 45 degreasing agent 45 Chemical dispersants 45 sulfolane 45 fluridone 45 carbonate ion 45 swallowing radioactive iodine 45 Hydrogen sulphide 45 ethyl acrylate 45 sorbent boom 44 toxaphene 44 skimming vessels 44 kinked pipe likely 44 oil spill 44 macroalgae 44 vapor plume 44 sodium hydrochloride 44 fracking fluid 44 trihalomethanes THMs 44 microbial degradation 44 sulfate aerosols 44 frac fluids 44 skimmer boats 44 deepwater blowout 44 Bridgette Verdin 44 rotenone 44 subsea dispersant 44 chlorinated solvents 44 sea turtle strandings 44 oily wastes 44 Hoffmayer 44 salvinia 44 cancer causer 44 Coast Gaurd 44 algal toxins 44 microscopic droplets 44 emulsified oil 44 azinphos methyl 44 toxic hydrogen sulphide 44 brown pelicans lazed 44 TCE PCE 44 Montara wellhead 43 dust suppressant 43 contaminents 43 BP Plcâ 43 benzene vapors 43 organophosphate insecticides 43 scattered tar balls 43 drilling muds 43 nitrogenous compounds 43 deepwater blowouts 43 petroleum distillates 43 naturally occurring radium 43 sumithrin 43 hydrogen sulfide gases 43 ChevronTexaco CVX 43 tarballs 43 delicate marshlands 43 tetrachloroethene PCE 43 blowdown stack 43 Homespun remedies 43 absorbent booms 43 pesticide aldicarb 43 sheens 43 coordinator Sam Borries 43 chemicals 43 BP.L 43 trichloroethene TCE 43 benzene arsenic 43 delicate coastal marshes 43 Adm Allen 43 plutonium americium 43 oily liquid 43 Adm Thad Allen 43 seafloor habitats 43 sulphate particles 43 underwater plume 43 tetrachloroethene 43 trichloroethene 43 lampricide 43 harmful vapors 43 spraying undersea dispersants 43 aquatic biota 43 micro droplets 42 contaminated bilge 42 antifouling coatings 42 Chandeleur Islands 42 hydraulic fracturing fluids 42 acid sulphate soils 42 deplete aquifers 42 topical anesthetic cream 42 icy hydrates 42 termiticide 42 gushing undersea 42 biodegraded 42 Oiled birds 42 oxidized mercury 42 oil 42 bioaccumulation 42 neutrally buoyant 42 chlorinated solvent 42 tributyl tin 42 MBTE 42 biotoxin 42 PCBs mercury 42 TCE trichlorethylene 42 chlorinated pesticides 42 perchlorethylene toxic 42 sorbents 42 unlined pits 42 polyaromatic hydrocarbons 42 groundwater contaminant 42 BP PLC BP BP.LN 42 Chloramines 42 Jane Lubchenco cautioned 42 oiled shoreline 42 corrosive seawater 42 outer edges complicated 42 insect repellent DEET 42 oilspill 42 wastewater effluent 42 sulfur trioxide 42 engineers AIChE SmartBrief 42 algal species 42 Blowout preventer 42 BP deploys deepsea 42 TCE vapors 42 aquatic herbicides 42 Dibrom 42 chloride salts 42 Water striders 42 underwater gusher 42 carbamate insecticides 42 OSPR 42 perfluorooctanoic acid PFOA 42 ozone depleting gases 42 benzene toluene ethylbenzene 42 spokesman Hugh Depland 42 contaminate aquifers 42 Hydrogen Sulfide 42 hydraulic fracking 42 geoduck harvesting 42 liquid nitrogen fertilizer 42 busted wellhead 42 aqueous cream 42 tar patties 42 flammable corrosive 42 Serum phosphorus 42 oily bilge water 42 sodium bisulfate 42 PFOAs 42 Failed blowout preventer 41 estrogenic compounds 41 PCBs dioxins 41 hydrocarbon reservoirs 41 endocrine disrupting compounds 41 toxic chemicals 41 Graham MacEwen 41 reroute trans Atlantic 41 bioremediation 41 planktons 41 deepwater rig exploded 41 Makushin Bay 41 PAH compounds 41 Q# vessel 41 hydrazine 41 endocrine disrupting chemicals EDCs 41 light sheens 41 sunken tanker 41 retardants 41 salt cedars 41 kinked pipe 41 Ozone Depleting 41 Radioactive substances 41 Harmful Algal Blooms 41 hydraulic fracturing fluid 41 Pyrethroids 41 chemical 41 skimmers tugs barges 41 naturally occurring algae 41 gallons/#.# [002] 41 undersea plumes 41 contaminated groundwater 41 Altose 41 lindane 41 Contaminated soil 41 tritium contaminated 41 poisonous chlorine 41 Biodegradation 41 toxic algae 41 containment booms vacuum 41 contaminants 41 protective booms 41 microplastics 41 gaseous methane 41 IMPACT Tons 41 oiled wildlife 41 sulphate aerosols 41 poisonous gasses 41 ruptured undersea 41 spokeswoman Skylar McElhaney 41 algae 41 Malathion 41 Horticultural oils 41 Sodium hydroxide 41 hypoxic zones 41 Bacillus thuringiensis var 41 tarlike 41 bacteria enterococci 41 bulk vitrification 41 paycheck Jurisich 41 CheckMate LBAM F 41 petroleum hydrocarbons 41 metabolize dispersant 41 carcinogenic pollutants 41 Endocrine disruptors 41 Brian Lezina state 41 organophosphate insecticide 41 chloramine 41 ciguatera 41 leaking Macondo 41 bio accumulative 41 groundwater contaminants 41 crab larvae 41 leaking Macondo well 41 Chandeleur Sound 41 BTEX chemicals 41 aquatic weeds 41 ciguatera toxin 41 molten sulfur 41 absorbent mats 41 ruptured undersea well 41 Sea squirts 41 enzymatic pathway 41 Alexandrium 41 LON BP 41 Quote BP.N Quote 41 synthetic pyrethroids 41 shale leasing 41 Harmful algal blooms 40 Methyl mercury 40 fecal coliform contamination 40 deepsea drilling 40 Discoverer Enterprise drill 40 stinky rotting 40 Retardant 40 deca bromine 40 benzene ethylbenzene 40 calcium magnesium acetate 40 bays estuaries 40 carbaryl 40 Deepwater Horizon spill 40 shale extraction 40 brevetoxin 40 absorbent pads 40 2 butoxyethanol 40 seawater 40 zinc pyrithione 40 chlorine residuals 40 Mastrati 40 methane hydrates 40 toxic pollutant 40 carcinogenic benzene 40 dichloroethene 40 Sulphur dioxide 40 xylenes 40 midfrequency sonar 40 Brackish water 40 Rough seas halt 40 Polychlorinated biphenyls PCBs 40 hat containment dome 40 permitorium 40 ecotoxicological 40 seagrasses 40 chlorine byproducts 40 robotic submersibles 40 burned skimmed 40 Tarballs 40 Mussel Watch 40 Varandey terminal 40 Burrard Clean 40 Warmer seas 40 aquatic organisms 40 floating downriver 40 biodegradation 40 BP PLC BP 40 seafloor gusher 40 dwelling organisms 40 EOR techniques 40 chlorinated compounds 40 toxic polychlorinated biphenyls 40 methyl chloride 40 fracking fluids 40 Nalipinski 40 Chalmette refinery 40 riser insertion tube 40 synthetic musks 40 endangered bowhead whales 40 benthos 40 retardent 40 toxic hydrogen sulfide 40 hydrophilic matrix 40 dispersants sprayed 40 PFOA perfluorooctanoic acid 40 chlorine ammonia 40 spokeswoman Elaine Makatura 40 BP PLC 40 produce briny wastewater 40 barges tractor trailers 40 MV Voc Daisy 40 Cap collects 40 Urushiol 40 moth pheromone 40 hydrofracturing 40 oxygenate MTBE 40 noxious chemicals 40 Inert ingredients 40 Absorbent pads 40 BP BP.L BP.N 40 organochlorine 40 skimmers 40 Deca BDE 40 organochlorine pesticide 40 rig explodes 40 DDT dieldrin 40 chinook bycatch 40 pollutants 40 Oil Spill 40 vibrio bacteria 40 massive underwater plumes 40 estrogenic chemicals 40 carbon tetrachloride 40 Oil Spill Response 40 HAAs 40 phosphine 40 oiled bird 40 derelict crab pots 40 broadleaf weed killer 40 BP Plc 40 viscous liquids 40 inoperable complicating 40 Volatile Organic Compounds VOCs 40 basal sands 40 contaminated sediments 40 Joint Incident Command 40 Hydrogen Sulfide H2S 40 blowdown drum 40 Casey Ranel 40 Gary Folley 40 Darcie Couture director 40 Bioremediation 40 marshes NOAA 40 frac'ing 40 impoundment ponds 40 Dimilin 40 G MARINE 40 spokeswoman Tisha Petteway 40 microscopic algae 40 bioaerosol 40 DecaBDE 40 Oil Spills 40 dechlorinated 40 Oil Recovery EOR 40 BP BP.N 40 Transocean Ltd. RIG 40 gaseous chlorine 40 Flow Rate 39 oiled sea turtles 39 Bti 39 LKC interval n 39 zinc oxide nanoparticles 39 Dioxane 39 containment booms 39 Sewage sludge 39 nematocysts 39 naturally occurring micro organisms 39 Chandeleur Island 39 shale tar sands 39 malathion 39 pheromone flakes 39 aerosol particles 39 methomyl 39 tetrachlorethylene PCE 39 streaky sheens 39 Deepwater Horizon Rig 39 robotic submarines 39 subtidal 39 Execs grilled 39 microcystin 39 inorganic arsenic 39 pyrethrins 39 neuro toxin 39 oily brown pelicans 39 cargo sweepings 39 OIL SPILL 39 Palos Verdes Shelf 39 dredged sediment 39 intertidal zones 39 deplete oxygen 39 Karenia brevis 39 Joe Ferson 39 changer Montero 39 residual bitumen 39 harmful algae bloom 39 Repellents containing DEET 39 gaseous contaminants 39 frac flowback 39 chromic acid 39 reef habitats 39 tertiary butyl ether MTBE 39 horticultural oils 39 rainbow colored sheen 39 sludge 39 hazardous material 39 BOEMRE 39 pyrethroids 39 harmless nitrogen 39 spill 39 volatilized 39 polychlorinated biphenyl 39 pesticide atrazine 39 Denbury Resources 39 BP LON 39 DuPont DeLisle plant 39 beryllium dust 39 Mercaptan 39 particulate matter soot 39 Sam Borries 39 dissolving coral reefs 39 cladophora 39 Hydrochloric acid 39 leased Deepwater Horizon 39 Finfish 39 Gas hydrates 39 Chlorine dioxide 39 Bayou Verdine 39 BP 39 Azeri Chirag Gunashli offshore 39 microbial contaminants 39 Nitric acid 39 clubbed tunicate 39 Brian LaMarre 39 Sodium dichromate 39 larval mosquitoes 39 pyrethroid pesticides 39 Pobrica 39 phosphorus concentrations 39 biotoxin monitoring 39 endoxifen 39 flame retardants PBDEs 39 microscopic phytoplankton 39 Algae blooms 39 drilling rig exploded 39 Nitrate contamination 39 hydrofluoric acid 39 sulfuric acids 39 toxic algae bloom 39 carcinogenic chemicals 39 Supermajors BP LON 39 aerobic biodegradation 39 fouling marshes 39 toxic algal blooms 39 aquatic toxicologist 39 Ugla Abid al 39 Hydrogen sulfide 39 Enterococcus bacteria 39 siloxanes 39 radioactive radium 39 salinities 39 Corks pillows suggested 39 St. Lucie Estuary 39 oily globs 39 Vinyl chloride 39 Untreated sewage 39 eco toxicological 39 endocrine disrupting chemicals 39 pesticides solvents 39 triclopyr 39 metam sodium 39 polluted groundwater 39 azelaic acid 39 insertion tube 39 Elemental mercury 39 Punctured lines 39 supertanker adapted 39 PCBs polychlorinated biphenyls 39 methyl cyanide 39 Amerada Hess AHC 39 Calliope Gas 39 RDS.A RDS.B 39 hazardous solvents 39 engineered nanomaterials 39 alongshore 39 vacuum distillation 39 conjugated estrogen 39 harmful contaminants 39 toxins 39 colorless flammable liquid 39 Nitrogen N2 39 Sodium cyanide 39 foul smelling odor 39 oil corralling booms 39 radiological hazards 39 compressed gases 39 nutrient inputs 39 Island Fabrication GIFI 39 hypoxic zone 39 E. Coli bacteria 39 Deepwater Horizons 39 hydrogen sulphide 39 sprayed chemical dispersants 39 radiological contaminants 39 hydraulic fracturing fracking 39 heptane 39 Chandeleur Islands barrier 39 sorbent booms 39 subsurface soils 39 Talmadge Creek 39 Electrofishing 39 horizontal hydrofracking 39 corrosives 39 toluene solvent 39 BP Plcā 39 diacetyl vapors 39 spartina 39 hydromulch 39 radioactive nuclides 39 diuron 39 solvent toluene 39 spokesman Ted Linnert 39 hormone disrupters 39 pesticides herbicides fungicides 39 turtle strandings 39 spokeswoman Katy Gresh 39 harmful algae blooms 39 methylene chloride 39 H2Omaxx 39 animals Inkley 39 bioaccumulative 39 storm outer edges 39 Capt. Ron LaBrec 39 GnRH agonists 39 false killer whales 39 blowout preventer BOP 39 respirable crystalline silica 39 polychlorinated biphenyl PCB 39 Muskeg River mine 39 odorous gases 39 larvacides 39 Super Scorpios 38 chemical methyl isocyanate 38 chlorine bromine 38 eggshell thinning 38 carbonate reservoir 38 plc Miscellaneous #.#.# 38 patented THAI 38 trihalomethane 38 underground geologic formations 38 Fewless 38 toxic solvents 38 busted blowout preventer 38 fragile marshlands 38 THMs 38 coastal marshes 38 microbubbles 38 oiled turtles 38 microscopic bubbles 38 major pelican rookery 38 Freemason Island 38 calcium sulfate component 38 HABs 38 scented baits 38 unregulated fracking 38 Polluted runoff 38 Sheremata 38 fragile marshes 38 SERVS 38 persistent bio accumulative 38 tar balls 38 skimmer vessels 38 buried tar mats 38 Halliburton HAL.N 38 Kaskida BP 38 hydrocarbon saturations 38 methyl ethyl ketone 38 Algal bloom 38 atmospheric aerosols 38 MyCelx 38 para dichlorobenzene 38 termiticides 38 PPCPs 38 naturally occurring bacteria 38 oestrogens 38 spewing wellhead 38 retardant foam 38 Kujawinski 38 deplete ozone 38 sheening 38 iron fertilization 38 artificial sweetener saccharin 38 underground coal seams 38 hydraulic fracturing 38 geoengineering schemes 38 Squamish Estuary 38 chemical dispersants underwater 38 hydrocarbons 38 hazardous vapors 38 skimmers sucked 38 frack fluid 38 acids alkalis 38 Pyrethrins 38 Admiral Paul Zukunft 38 portable extinguishers 38 seabottom 38 Resources GFRE 38 butyl acetate 38 Rig Explosion 38 tiny droplets 38 synthetic pheromone 38 sea lampreys 38 DeepWave SM Technology 38 Carbaryl 38 Superfund hazardous waste 38 non comedogenic 38 hydraulic dredges 38 harmful algal blooms 38 sheen tar balls 38 gasoline Krob 38 pheromone spray 38 toluene diisocyanate 38 toxicants 38 Chlorine bleach 38 Deepwater Horizon wellhead 38 oxidizers 38 piperonyl butoxide 38 subsurface 38 disinfection byproducts DBPs 38 oysters shrimp crabs 38 biphenyl 38 Offshore drillers 38 solvents 38 herbicides 38 trans fatty acids TFAs 38 pollutant 38 liquid de icers 38 additive methyl tertiary butyl 38 formaldehyde benzene 38 dissolved oxygen levels 38 fracking wastewater 38 allyl alcohol 38 riser insertion tool 38 methyl ethyl 38 toxic solvent perchlorethylene 38 vinyl shower curtains 38 Tetrachloroethylene 38 Fracking involves 38 vapor mist 38 remained unstopped 38 chloride concentrations 38 Incident Response Force 38 Didemnum 38 spokeswoman Mary Detloff 38 chondroitin sulphate 38 injectivity test 38 Mexico GOM 38 suspected carcinogen 38 gusher unclear 38 airborne particulate matter 38 geomagnetic substorms 38 frac plugs 38 suction dredging 38 perfluorooctane sulfonate 38 Metachem 38 BPâ 38 reef organisms 38 Lake Pontchartrain pronounced PAHN 38 isotope polonium 38 toxic substances 38 lewisite 38 brown pelicans rehabilitated 38 soot particulates 38 Bayou Chico 38 dredged material 38 toxic dioxins 38 Geoffrey Thyne 38 perchlorate contamination 38 organic manures 38 fragile marine ecosystems 38 toxic mercury vapor 38 Jane Lubchenko 38 Capt. Scott Gureck 38 tar mats 38 microscopic larvae 38 Opflex 38 Cheal A4 38 ruptured wellhead 38 rheology modifiers 38 Ixtoc blowout 38 dissolved solids 38 NASDAQ GFRE 38 chloramines 38 absorbing booms 38 nonhazardous materials 38 Deepwater Horizon 38 flowback 38 Substances Control 38 herbicide 38 blackbird baiting 38 CO -2 38 ariakensis 38 algaes 38 benzene contamination 38 organotins 38 mosquito larvicide 38 Rotenone 38 volatile organic compounds 38 deca BDEs 38 Triclosan 38 Well Containment System 38 gushing unchecked 38 coastal wetlands 38 Diazinon 38 nuclides 38 toxic nitrobenzene 38 toxic pollutants 38 Exxon Valdez supertanker 38 Unified Incident Command 38 oily 38 Eric Hoffmayer 38 sodium coolant 38 Harmful Algal Bloom 38 Eagle Atome 38 phosmet 38 chlorophyll concentrations 38 Dichloro Diphenyl Trichloroethane DDT 38 retardant 38 sonofusion 38 COO Doug Suttles 38 delicate Chandeleur Islands 38 GULF OF MEXICO 38 dimethyl sulfide 38 larvicidal 38 Wilma Subra 38 tritium contamination 38 flammable combustible 38 solvents pesticides 38 Kill Procedure 38 Paraquat 38 Muhsin Khadar al Khafaji 38 Drilling Moratorium 38 splittail 37 fire retardant foam 37 bromine compounds 37 RenJet ® 37 acidization 37 alachlor 37 tanner crab fishery 37 teratogenic effects 37 Seabulk Pride 37 oil spil 37 hydrogenate crude oil 37 Depland 37 fumigants 37 Inger Anda 37 herbicide Agent Orange 37 Ceresco Dam downstream 37 yellowish liquid 37 toxic 37 disinfection byproducts 37 nutrient runoff 37 rebreathers 37 harming plankton 37 glacial acetic acid 37 atrazine herbicide 37 Sulfur compounds 37 Embalming fluid 37 turbid waters 37 situ bitumen 37 Response Agency NOSDRA 37 spokeswoman Gail Mastrati 37 Atmospheric Administration 37 producer CNOOC #.HK 37 Huntsman Corp HUN.N 37 washing ashore 37 spokesman Vladimir Buyanov 37 Cook Inlet beluga whale 37 vacuum skimmers 37 gallon Ixtoc 37 carcinogenic dioxins 37 Hydraulic Fracturing 37 chuh appears 37 Diporeia 37 deca BDE 37 LMRP Cap Containment System 37 Groundwater contamination 37 Bharat Mathur 37 Petty Ofc 37 Containment booms 37 absorbents 37 Methyl bromide 37 bacteria B. cepacia 37 superchilled 37 pest repellents 37 Lubchenco 37 Patrick Etchart 37 Caloosahatchee estuary 37 Hydraulic fluid 37 Macondo wellhead 37 firefighting foams 37 nonylphenol 37 larvicides 37 coral colonies 37 acid chloride 37 DilBit 37 birds sea turtles 37 coral Enzler 37 Skan Bay 37 cyclohexane 37 hazardous materials 37 NOAA Lubchenco 37 biohazardous waste 37 deepwater Macondo 37 rust colored slick 37 coral reef degradation 37 shallow aquifer 37 keeps pluming 37 nanoparticle formulations 37 methoprene 37 oiled birds 37 supertanker Exxon Valdez 37 supermajor ExxonMobil 37 rockweed 37 sulfur gases 37 inhaled nitric oxide 37 invasive zebra mussels 37 PCB contaminated sediments 37 diphacinone 37 toxin 37 topical gels 37 emergent vegetation 37 sunken barge 37 waterborne pathogens 37 fouling marshland 37 Sulfuric acid 37 permeability reservoir 37 lamprey larvae 37 ton containment dome 37 Foray #B 37 Methane CH4 37 contaminant plume 37 nanoclays 37 mercury PCBs 37 broccoli sprout extract 37 hydrocarbon vapor 37 operating submersible robots 37 Exxon Mobil XOM.N 37 aromatic amines 37 phytoplankton blooms 37 Upper Mirador 37 Oil Skimmer 37 tar balls ashore 37 Fischer Tropsch fuels 37 cleaning oiled birds 37 hydraulically fracturing 37 DuPont Co. DD.N 37 RDSa.L Quote 37 methane 37 navigational hazards 37 Resources NASDAQ GFRE 37 Chukchi Cap 37 visibly oiled 37 halons 37 brown pelicans gulls 37 perfluorinated chemicals 37 sealife 37 BP Plc BP.N 37 mosquito repellents containing DEET 37 hormone mimicking 37 surfactants 37 Robotic submarines 37 vinyl chloride monomer 37 inexpensively formulate hydrogen 37 Lt. Suzanne Kerver 37 RO membranes 37 Environmental Protection Agency 37 marine mammals 37 pesticide endosulfan 37 Caroline Wittgen Shell 37 Flowing tubing pressure 37 contaminant 37 endangered Steller sea lions 37 larvacide 37 spokeswoman Prem Nair 37 Discoverer Enterprise drillship 37 deep convective clouds 37 endangered sperm whales 37 Oneal Galloway 37 pesticide Anvil 37 fluorinated chemicals 37 Tar Balls 37 Deepwater rig 37 biological oceanographer 37 seine nets 37 #,#,# trichloroethane 37 brown pelicans coated 37 gaseous hydrocarbons 37 perchlorate salts 37 hypergolic propellants 37 insecticide sprays 37 microemulsion 37 Submersible Voraxial 37 air sparging 37 StatoilHydro ASA STO 37 spokesman Mark Proegler 37 Louisiana fragile marshlands 37 hydrilla 37 hydro carbons 37 Goudsmith 37 chemisorption 37 incinerating sand 37 Doc Goofy Jigs 37 traps pelicans 37 Gulf Corexit #A 37 guillemots 37 Robot submarines 37 chlorine disinfectant 37 Kuldip Nayar Special 37 dehydrogenation 37 harlequin ducks 37 contaminates drinking 37 nitrogen tetroxide 37 deicer 37 Vaalco Energy 37 herbicide sprays